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  <title>返回分配给 PHP 内存的峰值</title>
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  <div id="layout-content"><div id="function.memory-get-peak-usage" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">memory_get_peak_usage</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.2.0, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">memory_get_peak_usage</span> &mdash; <span class="dc-title">返回分配给 PHP 内存的峰值</span></p>

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 <div class="refsect1 description" id="refsect1-function.memory-get-peak-usage-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>memory_get_peak_usage</strong></span>(<span class="methodparam"><span class="type">bool</span> <code class="parameter">$real_usage</code><span class="initializer"> = <strong><code>false</code></strong></span></span>): <span class="type">int</span></div>

  <p class="para rdfs-comment">
   返回分配给你的 PHP 脚本的内存峰值字节数。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.memory-get-peak-usage-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">real_usage</code></dt>

     <dd>

      <p class="para">
       如果设置为 <strong><code>true</code></strong> 可以获取从系统分配到的真实内存尺寸。
       如果未设置，或者设置为 <strong><code>false</code></strong>，仅会报告 <code class="literal">emalloc()</code> 使用的内存。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.memory-get-peak-usage-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   返回内存峰值的字节数。
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.memory-get-peak-usage-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.memory-get-usage.html" class="function" rel="rdfs-seeAlso">memory_get_usage()</a> - 返回分配给 PHP 的内存量</span></li>
    <li class="member"><span class="function"><a href="function.memory-reset-peak-usage.html" class="function" rel="rdfs-seeAlso">memory_reset_peak_usage()</a> - Reset the peak memory usage</span></li>
    <li class="member"><a href="ini.core.html#ini.memory-limit" class="link">memory_limit</a></li>
   </ul>
  </p>
 </div>


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